My question is: is there a way to quickly migrate my Aperture library to Lightroom or should I reimport all the original photos into it?
There is no direct method to migrate your Aperture library to Lightroom. If you have saved your metadata to the masters, then that metadata will, for the most part, be recogized when you import your photos into Lightroom. Note that adjustments made to your master photos within Aperture WILL NOT be migrated or recognized by Lightroom.
Just to clarify: I haven't abandoned Apple (yet). I simply will not use Lion.
Thanks for the helpful answer. So I can import both the masters and the latest "versions" I modified. In this case I have the good versions of the already modified photos and the master to re-develop in LR if needed.
I realize this topic is old but doens't appear to be answered.
I agree. I went the adobe way. I love my MBPr though.
I wrote about why I think it's better for photos here why it's better for video (for fusion videographers only) here, why I switched here, and how to switch here with this associated video tutorial for switching.
Those posts list the pros and cons between the two.